JeA is the one responsible for the creation of Brown Eyed Girls and was actively involved in the selection of the other members besides herself. The four members - JeA, Narsha, Ga In and Miryo - performed several small shows under the name "Crescendo" before officially debuting as Brown Eyed Girls in 2006. JeA is the leader and main vocalist of the group.

JeA released her first solo album, "Just JeA", in 2013. She is the last of the members of Brown Eyed Girls to release a solo album. Aside from being a singer she's also a composer and producer. She started composing for her group with their second album and later on wrote songs for other artists also. She expanded her resume by trying her hand on producing with the Brown Eyed Girls' The Original and her solo album.

A representative of Brown Eyed Girls’ agency, Nega Network, confirmed that JeA has been dating YG Entertainment producer Choi Pil Kang (also known as PK) for 3 years.[8][9] The next day, JeA confirmed and released a letter to her fans on Twitter.[10]